There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The longest a person has survived after a heart transplant is 24 years.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Medication errors are three times higher among children and infants than with adults.
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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
Colorectal cancer. The most common sites of tumor development are shown.
Elefon helmet mask, Yoruba culture, Nigeria.
Transmission of recessive disorders (25% chance for an affected child).